Development, Testing and Specifications of Super Precision Force Transducers for International Comparison Measurements

Abstract

The international interlacing of business and trade makes it necessary to compare the force standard measuring machines of the different countries. As this cannot be done in a direct way-especially for high forces up to 1 MN-special force transducers have to be used. Due to the high demands on repeatability, which must be less than 2 • 1 0 ⁻⁵ for the whole measuring chain, only straingage transducers in combi-nation with high precision electronic equipment are suitable. The different types of force standard measuring machines interact in different ways with the applied force transducers. The result may be the occurrence of undesired force components or asymmetric load. On one hand the amount of this error depends on the system and on the other hand on the design of the force transducer used.